/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.gravitino.cli.commands;

import org.apache.gravitino.NameIdentifier;
import org.apache.gravitino.cli.CommandContext;
import org.apache.gravitino.cli.DefaultConverter;
import org.apache.gravitino.cli.ErrorMessages;
import org.apache.gravitino.client.GravitinoClient;
import org.apache.gravitino.exceptions.NoSuchCatalogException;
import org.apache.gravitino.exceptions.NoSuchColumnException;
import org.apache.gravitino.exceptions.NoSuchMetalakeException;
import org.apache.gravitino.exceptions.NoSuchSchemaException;
import org.apache.gravitino.exceptions.NoSuchTableException;
import org.apache.gravitino.rel.TableChange;

/** Update the default type of a column. */
public class UpdateColumnDefault extends Command {

  /** The name of the command. */
  protected final String metalake;
  /** The name of the catalog. */
  protected final String catalog;
  /** The name of the schema. */
  protected final String schema;
  /** The name of the table. */
  protected final String table;
  /** The name of the column. */
  protected final String column;
  /** The new default value. */
  protected final String defaultValue;
  /** The new default data type. */
  protected final String dataType;

  /**
   * Update the default type of a column.
   *
   * @param context The command context.
   * @param metalake The name of the metalake.
   * @param catalog The name of the catalog.
   * @param schema The name of the schema.
   * @param table The name of the table.
   * @param column The name of the column.
   * @param defaultValue The new default value.
   * @param dataType The new default data type.
   */
  public UpdateColumnDefault(
      CommandContext context,
      String metalake,
      String catalog,
      String schema,
      String table,
      String column,
      String defaultValue,
      String dataType) {
    super(context);
    this.metalake = metalake;
    this.catalog = catalog;
    this.schema = schema;
    this.table = table;
    this.column = column;
    this.defaultValue = defaultValue;
    this.dataType = dataType;
  }

  /** Update the default type of a column. */
  @Override
  public void handle() {
    String[] columns = {column};

    try {
      NameIdentifier columnName = NameIdentifier.of(schema, table);
      GravitinoClient client = buildClient(metalake);
      TableChange change =
          TableChange.updateColumnDefaultValue(
              columns, DefaultConverter.convert(defaultValue, dataType));

      client.loadCatalog(catalog).asTableCatalog().alterTable(columnName, change);
    } catch (NoSuchMetalakeException err) {
      exitWithError(ErrorMessages.UNKNOWN_METALAKE);
    } catch (NoSuchCatalogException err) {
      exitWithError(ErrorMessages.UNKNOWN_CATALOG);
    } catch (NoSuchSchemaException err) {
      exitWithError(ErrorMessages.UNKNOWN_SCHEMA);
    } catch (NoSuchTableException err) {
      exitWithError(ErrorMessages.UNKNOWN_TABLE);
    } catch (NoSuchColumnException err) {
      exitWithError(ErrorMessages.UNKNOWN_COLUMN);
    } catch (Exception exp) {
      exitWithError(exp.getMessage());
    }

    printInformation(column + " default changed.");
  }

  @Override
  public Command validate() {
    if (dataType == null) exitWithError(ErrorMessages.MISSING_DATATYPE);
    return super.validate();
  }
}
